The kind I can hear the words to.
I don't care the genre. Just have to have a audible words.
I can't stand music that the words are screamed, blurred, or so fast you cant tell what they are saying...
WITH EXCEPTION
To Classical, and some Electronic styles where words are not included. But if there is a vocalist, I need to be able to understand them.
Except for Opera, which is likely a language I don't speak, but if I can google the basic meaning I'm good.

"This must be Thursday", said Arthur musing to himself, sinking low over his beer, " I never could get the hang of Thursdays."-HHGTTG
Never trust the Iguanas. They are trying to take over the world.